Thanks, Don. Will seek that one out.

You may enjoy this site. It is a feast; it doesn't really teach math as much as it does serve as an exhaustive compendium of the complete field, with plenty of examples. Everything is filed in "tree" form, so once you select a topic, it lists subtopics, and then there are more subtopics of each subtopic....YIKES. But it's all good fun. Czech it out:

http://mathworld.wolfram.com/

Just remember a donut and a coffee cup are the same thing, at least Topologically!

Click this on, and scroll down the page, for a very cool video clip of the coffee cup transforming topologically into a torus...Bet the folks at Dunkin' Donuts don't know about it..

http://en.wikipedia.org/wiki/Topology